please note, there are a lot of different languages that you are able to use in this site, so if you do not understand English all that well, you may use this link above (traiworld), and it might have your native language / tongue, so that way you can understand it better, the trainworld link will also help you know when a sailor will be able to be changed to the next level, and how long it will take you to get to or what level you are able to change to your next ship.
Hope that these link will help you on your way to learning and enjoying the NF experience.